Siemens have developed a new electric motor that pumps out 260kW from only 50kg in weight! Now if the battery weight can be kept down using Lithium batteries (1/4 weight of lead/acid batteries), this is amazing stuff! Look, I do love those antiquated products made by Lycoming and Continental (well, not so much the Continental engines!), but it is high time for some new technology in light aeroplane engines. Revving at the right RPM for the prop, no reduction gearbox is required, saving more weight.
http://www.theengineer.co.uk/aerospace/news/record-breaking-motor-could-make-large-electric-aircraft-a-reality-claims-siemens/1020106.article